Everything is used. You just need a lathe and a mill to shorten and chop parts and a welder to... ummm... weld. You won't need the fore stock.
beautiful rifle. im gonna get a 93 receiver. anyone know who's got kits right now? i hkparts does, but apex is out and maybe there are some better deals out there?There are several ways to do a 53. I used a 93 receiver and a 33 kit with a RCM 53 barrel.
I did one for a customer last year and he bought a 53 receiver to use. I prefer doing it on the 93 receiver.